Lamp



FIG. 1 is a front view thereof;

FIG. 2 is a right side view thereof, which is similar to a left side view;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a perspective view of a lamp showing our new design.

The bottom side is plain and unornamented.

The subject matter shown in broken lines forms no part of the claimed design. 

The ornamental design for a lamp, as shown and described. 